CVE-2026-103401
Session Smart Router and Session Smart Conductor: An attacker can overwrite arbitrary files as root
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
An Improper Link Resolution Before File Access ('Link Following') vulnerability in the unauthenticated web server handlers in Juniper Networks Session Smart Router and Session Smart Conductor allows a local unprivileged user to overwrite arbitrary files as root via unauthenticated API endpoints. This vulnerability can be exploited on Mist-managed routers and on unmanaged Routers that have not yet been onboarded to a Conductor. Routers already managed by Conductor are not affected.
| CWE | CWE-59 |
| Vendor | juniper networks |
| Product | session smart router |
| Published | Oct 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Juniper Networks / Session Smart Router
0 < 7.0.5 7.1.0 < 7.1.7 7.2.0 < 7.2.3
Juniper Networks / Session Smart Conductor
0 < 7.0.5 7.1.0 < 7.1.7 7.2.0 < 7.2.3